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5066247: Refine the spec of equals() and hashCode() for j.text.Format classes

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Reviewed-by: naoto, darcy
This commit is contained in:
Justin Lu 2023-10-02 05:06:45 +00:00
parent 93f662f4fc
commit 8fcf70e931
9 changed files with 141 additions and 25 deletions
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18
src/java.base/share/classes/java/text/CompactNumberFormat.java
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@ -2343,13 +2343,17 @@ public final class CompactNumberFormat extends NumberFormat {
}
/**
* Checks if this {@code CompactNumberFormat} is equal to the
* specified {@code obj}. The objects of type {@code CompactNumberFormat}
* are compared, other types return false; obeys the general contract of
* {@link java.lang.Object#equals(java.lang.Object) Object.equals}.
* Compares the specified object with this {@code CompactNumberFormat} for equality.
* Returns true if the object is also a {@code CompactNumberFormat} and the
* two formats would format any value the same.
*
* @implSpec This method performs an equality check with a notion of class
* identity based on {@code getClass()}, rather than {@code instanceof}.
* Therefore, in the equals methods in subclasses, no instance of this class
* should compare as equal to an instance of a subclass.
* @param obj the object to compare with
* @return true if this is equal to the other {@code CompactNumberFormat}
* @see Object#hashCode()
*/
@Override
public boolean equals(Object obj) {
@ -2373,7 +2377,11 @@ public final class CompactNumberFormat extends NumberFormat {
}
/**
* {@return the hash code for this {@code CompactNumberFormat} instance}
* {@return the hash code for this {@code CompactNumberFormat}}
*
* @implSpec Non-transient instance fields of this class are used to calculate
* a hash code value which adheres to the contract defined in {@link Objects#hashCode}
* @see Object#hashCode()
*/
@Override
public int hashCode() {